We dropped the update_data calls a while ago. Clean up the code
to match the reality and drop the remaining no-op pieces. Update
the comments to reflect the slowest operations and let the cookie
monster's spirit live on!
(Bitbake rev: 584989ed2b5af4e8799571dece0cf94f995ef14e)
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>